66655470755 has 8 divisors (see below), whose sum is σ = 80365649424. Its totient is φ = 53071653600.

The previous prime is 66655470709. The next prime is 66655470767. The reversal of 66655470755 is 55707455666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66655470755 - 2⁶ = 66655470691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66655470755.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31589216 + ... + 31591325.

It is an arithmetic number, because the mean of its divisors is an integer number (10045706178).

Almost surely, 2^66655470755 is an apocalyptic number.

66655470755 is a deficient number, since it is larger than the sum of its proper divisors (13710178669).

66655470755 is a wasteful number, since it uses less digits than its factorization.

66655470755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63180757.

The product of its (nonzero) digits is 26460000, while the sum is 56.

The spelling of 66655470755 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy thousand, seven hundred fifty-five".